Communication Device, Communication Method, and Program

2. The communication device according to claim 1, wherein the circuitry is configured to control the transceiver to notify the another terminal device of the different pattern.

3. The communication device according to claim 2, wherein the circuitry is configured to control the transceiver to notify the another terminal device after the pattern is switched to the different pattern.

6. The communication device according to claim 2, wherein information regarding the different pattern is provided by the transceiver as a bitmap.

7. The communication device according to claim 1, wherein the circuitry is configured to switch the pattern in response to receiving an instruction from another communication device.

8. The communication device according to claim 7, wherein the another communication device is a base station.

9. The communication device according to claim 7, wherein the another communication device is another terminal device having authority regarding control of the inter-device communication.

10. The communication device according to claim 1, wherein the circuitry is configured to switch the pattern in response to receiving a request from the another terminal device.

11. The communication device according to claim 10, wherein the circuitry is configured to switch the pattern in response to a reception timing of the another terminal device in the inter-device communication.

13. The communication device according to claim 1, wherein a timing advance value for the another terminal device to designate a destination and transmit data by the inter-device communication is calculated on a basis of a synchronization signal selected by the another terminal device among the plurality of synchronization signals.

16. The communication device according to claim 15, wherein the circuitry is configured to perform control so that the frame synchronization is performed on a basis of at least one of a global navigation satellite system (GNSS) signal, a downlink signal transmitted from a base station, or a signal transmitted from a terminal device having authority regarding control of the inter-device communication.

17. The communication device according to claim 1, wherein the circuitry is configured to control a number of the plurality of synchronization signals according to a predetermined condition when the pattern is switched.

18. The communication device according to claim 1, wherein the circuitry is configured to control allocation of resources for the another terminal device to transmit data via the inter-device communication.